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Solanum elaeagnifolium

The silverleaf nightshade, Solanum elaeagnifolium is a perennial herb, covered with dense silver-whitish stellate trichomes, which give them its characteristic aspect. It belongs to a elaeagnifolium group of spp distributed in both South America and North America. Widely distributed in Argentina together with two other species that belong to the …

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The Argentine fleabane

The management of “Argentine fleabane”, Conyza bonariensis, is a main problem in fallows and summer crops. This species is widely distributed and it appears both in abandoned fields and in cultivated areas in Argentina. Its high production of seeds, ability to self-pollinate and easy adaptation to a wide range of …

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Cat’s claw

FuEDEI and ARC from South Africa signed a cooperation agreement and benefits sharing to search and study natural enemies associated with Dolichandra (syn. Macfadyena) unguis-cati (L.) A.H. Gentry (Bignoniaceae) to evaluate their potential as biological control agents. The seed-feeding weevil Apteromecus notatus (Hustache) (Coleoptera: Curculionidae) has been found in relatively …

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Mesquite-Prosopis spp.

  Invasive Prosopis species (Leguminosae) (mesquite) pose a significant threat to biodiversity, pasture production and water resources in South Africa. Aspects of the biology and the host range of the seed-feeding weevil, Coelocephalapion gandolfoi Kissinger (Coleoptera: Brentidae: Apioninae), were studied in Argentina and South Africa to evaluate its potential as …

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Waterhyacinth

Waterhyacinth (WH), Eichhornia crassipes, is a floating macrophyte, perennial and one of the worst aquatic weed worldwide because its aggressive growing and dispersion ability. WH was brought to the whole world from South America as ornamental and thus has become an invasive species. In 1968 started the investigations in our …

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Brazilian peppertree

Phytophagous insects associated with Schinus terebinthifolius Raddi (Anacardiaceae) in Argentina Brazilian peppertree (BP), Schinus terebinthifolius, native to South America, is invasive weed in the USA, Australia and South Africa. In June 2004 an agreement for cooperation on Brazilian peppertree research was reached between FuEDEI and the Invasive Plant Research Laboratory …

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Brazilian waterweed

Brazilian waterweed, Egeria densa (Hydrocharitaceae), is native from South America; it thrives in clear and lentic watercourses of the Paraná basin and Buenos Aires lagoons, as well as endorheic basins of Córdoba province, Argentina.  Introduced as ornamental for aquariums, it became an aggressive invader in South Africa, Australia, China, USA, …

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Water primrose

Water primroses, Ludwigia grandiflora, L.g. ssp hexapetala, and L. peploides, are an invasive group of aquatic plant species, forming extensive monospecific mats that impair water flow and shoreline activity, diminishing the plants biodiversity in de ecosystem. They reproduce by seeds and vegetatively, and have the potential to dominate the vegetation if introduced to lakes, river, …

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Water lettuce

Pistia stratiotes L. (Araceae) is an aquatic floating macrophyte, supposed original from South America and India subcontinent. Spread all over the world as ornamental, is now an invasive species in many countries in Africa, Asia, Australia and North America. It impedes the access and use of the water, the recreation and …

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Alligator weed

  Ploidy level effect of alligator weed on the phytophagous insects and phytopathogens. The alligator weed, Alternanthtera philoxeroides, is an allopolyploid from South America and invasive in several regions in the world. This weed invades agricultural and natural ecosystems such as rice, soybeans, sunflower and corn.

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